Added a notice about HTML email to the 'requirements' section of the
README.txt.

style hashing option for the encoder.

system so that it handles any id instead of duplicating hooks on a per
id basis.

check for valid snid to open function.

an option to enable or disable the tracking of test send opens and
clicks.

overview page implementation with a view.

the content simplenews tab, similar to the one found in the D6 version
of this module.

supports unique clicks and the CTR supports decimal precision.

uses unique open count and supports decimal precision.

show unique count and open rate.

Also made the 'sent count' that simplenews provides more obvious to find by changing the title and description with hook_views_data_alter().

various calculations. Reintroduced the {simplenews_statistics} db table.

replacement.

subscriber record.

terminates.

handled. We now rely on a single variable for link tracking, and two for open tracking.

definitions.

clicks should now be properly encoded and stored. Stats tab should now
display click entries.